Pneumatic multiple pick



June 25, 1929. J. 5. HARRISON 1,718,924

PNEUMATIC MULTIPLE PICK Filed May 22, 1925 2 Sheets-Sheet 1 Jo HR 5. Hmam so gwuemto'c WWQW June 25, 1929. I J, H R N 1,718,924

PNEUMATIC MULTIPLE PICK Filed May 22, 1925 2 Sheeis-Sheet 2 Jon $.HARR1SON gvwawcoz Patented June 25, 19.29.

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'JQl-IN' STEWART HABEISQN, OF CHARLESTON, SOUTH CAROLINA, ASEEIGNOR 13C! fiftiil-IDARD OIL DEVlLlLOPMENT COMPANY, A CGRPOPMATION G1 DELAWARE.

PItIltlUll'lAllliIfi M'JLTIPLE PICK.

The present invention relates to the art of removing hard material deposited within the interior iii a containe and more spec'lically to a means :tor removing the hard cokedike substance deposited within a vertically disposed cl'ianiher, known as a soaking drum, settlinsr tank or the like, by the cracking oi hvdrotarbons under pressure. The invention will be tally uinlerstood from the followin;' description taken in connection with the .tcE-ompanying drawings which represent d1 aagrannnatieally a term of apparatus contcinplated in the invention and wherein his}. 1 is h view in section of a container or drum showing my improved pick in operative position within the container; ll 2 is a side elevation of the pick, showing internal construction in dotted outline; Fig. 3 is a transverse section on line lll fllll, Fig. 9.; Fig. 4-

a perspective view showing the blades of the pick and the crosshead to which they are attached with a broken section of the casing immediately surrouinling the cross-head; and Fig. 5 is a plan of the said cross-head as observed 'l'roin l ncath showing the manner of attachment of the blades thereto.

- Referring; particularly to the drawings, a chznnber or cont: nor 1, whose height is great in comparison with its width, has openings 2, 2 at opposite ends thereof which are closed by n'ieans of tightly fitting: and bolted heads (not shown). After the container has been more or less tilled with a deposit; 3, such as coke. for example, and the process whereby the deposit is formed has been interriuitcd, the covers are removed from the openings e, E2 and a hole 4t, of any desired or siilitablc diameter, is drilled by any suitalile means, through the. en tire depth of the deposit.

A pick, operated as hereinafter described, and with its blades in inoperative position, is then lowered by means of a derrick or other hoisting and lowering means through the upper manhole opening 2 and into the hole or channel 4 to a position such that the cutting or picking); elements will be somewhat below the upper surface of the deposit.

The pick as ordinarily constructed coinprises a casing 5, having; a cap 6 fastened tightly thereon. An eye-bolt 7 is fastened to the center of the cap, and a cable 8, which leads to the hoisting and lowering device (not shown), is attached to the eye-bolt.

. The casing 5 is bored at its upper end for a suitable distance to accommodate a piston 9.

The lower end 10 ot' the piston housing is welded to the casing 5 to form a gas tight cylinder 21 for the purpose as hereinafter described.

The piston 9 is attached to a piston rod 11 which operates through a shifting box 12 kept tight by means of a packing, thus permitting the cylindzr 21 to be maintained air or gas ti ht. The lower end oi? the piston rod 11 is attached to a cross-head 13 to which are attached the cntensibh-i blades lei of any desired nuinher but preferably lion r or six in number and preferably arranged approximately at equal angles to one another. Oppositely arranged pairs of blades may be crossed to perinit more leverage or may be attached by pins 15 to the cross-head .13 as shown. Guides 18, in the term of plates extending); parallel and adjacent to the blades 14, may be arranged in the cross-head 1.3 to keep each blade approximately in one place. The extensible blades are drawn into and pushed out 'tl'OlH the casing by the action of piston rod 11 n1o\" ingup and down through the striding box 12. lhe casing; 5 is slotted at the points 16 where the blades protrude beyond the casing and acts a guide for the blades themselves. Rollers 1.8 on arms 17 suitably fastened to the casino 5, are positioned so that the blades protruding 'tlll'OUPfll the slots 16 slide over and run on the rollers.

llhe piston 9 is actuated by fluid means, pre'ter: hly air. admitted to the cylinder above Lhe piston therein through a connection 19 positioned prc u-ably in the top portion of cap (3. rrno'ther connection 20 is provided to deliver air or other fluid or expansive means to the under side of the piston 9 as shown. whereby the piston, after it has reached the end oil its down stroke, is forced upward to its initial position for starting the down stroke. 'lhe air connections are preferably tour way manifolds ol the well known type which permit the discharge of air from the cylinder both above and below the piston through the same hose that later supplies air to more the piston to its upward or downward position.

The pick, them with its blades in inoperative position as shown in Fig. 1, is lowered by means oi? the hoisting device into the channel 4 drilled throughout the depth oi": the deposit contained within container 1, to a point where the openings through which the extensible blades operate, are approximately one foot below the Ytpper surface of the deposit. Air or other fluid means is then supplied under pressure through connection 19 whereby the piston 9 and piston rod 11 are forced downward. As the piston 'rod moves downward, the extensible blades 14 ride outward through slots 16 and over the rollers 18 and are forced into the coke 3 or other hard deposit within the container.

and dislodging the coke within which the blades are embedded. ,The coke or other deposit thereupon falls downwardly through the vertical channel previously drilled through the material.

Air is then admitted through the connection-2O into the portion of the cylinder on the underside of the piston 9 which is thereby forced upwardly to its extreme uppermost position. As the piston 9 and piston rod 11 v move upwardly, the extensible blades 14 are retracted and withdrawn within the cylinder into an inoperative position. The pick is then lowered again to the position desired in the channel and the operation repeated in the manner as described until the entire deposit of coke has been substantially completely removed from the interior of the container.

Although the description of the process has specifically pointed out a means of removing from a drum the coke produced by the cracking of oils, it is to be understood that the means described are equally applicable to the cleaning out of any diflicultly removable solid material which has been deposited or laid down within a container in any manner or by any process.

I claim: I I 1. In an apparatus for breaking up doposits, the combination of a structure comprising a'piston, means for reciprocating the piston, an element connected for extension to engage the deposit on the movement of the piston in one direction, means for maintaining the extended position of the element, means for elevating the structure while the element is engaged with the deposit whereby the deposit is broken away, and means for retracting the element.

2. In an apparatus for breaking up doposits, the combination of a structure comprising a piston rod, means for reciprocating said rod, a pick operatively connected to the rod and rollers for guiding the picks upon reciprocation of the rod.

3. In an apparatus for breaking up depos s the combination of a structure comprising a cylinder, a housing within said cylinder, a piston operable within said housing, fluid means for operating said piston, means for delivering said fluid means to said housing, a piston rod connected to said piston and operated thereby, a cross-head attached to said piston rod, a pick connected to the cross-head and guides associated with the pick.

4. In an apparatus for breaking up deposits, the combination of a structure comprising a cylinder, a housing within said cylinder, a piston operable within said housing, fluid means for operating said piston, means for delivering said fluid means to said housing, a piston rod connected to said piston and operated thereby, a cross-head attached to said piston rod, and a pick pivotally connected to said cross-head, said pick being extended into operating position by the downward movement of the piston.

5. In an apparatus for breaking up deposits, the combination of a structure comprising a cylinder, a housing within said cylinder, a piston operable within said housing, air connections for delivering air under pressure to said housing to operate the piston therein, a piston rod connected to said. piston and operated thereby, a cross-head attached to said piston rod, and picks pivotally connected to said. cross-head, said picks being extended through slots in said cylinder into an operating position by the downward movement of the piston.

JOHN STEIVART HARRISON. 

